1. At a local farm, you buy a few pumpkins to turn into Jack-o-Lanterns and place them on the backseat of the car. On the way home, you begin to brake as you approach a stop sign. At first the pumpkins stay put, but as you brake a bit harder, they begin to slide off of the seat. (a) Explain using the concept of friction and (b) then explain using the idea of inertia.
If our Sun were to collapse, without significant loss of mass, into a star of radius 5000 km, estimate the period of rotation of that star. The Sun's mass is 1.99 x 1030 kg, the radius of the Sun is 6.95 x 108 m and its period of rotation is approximately 25 days.
A ball player catches a ball 3s later after throwing it vertically upward, with what speed did he throw it?
A ball of mass 0.40kg is attached to a light rope of length 1.0m. The ball is moving in a vertical circle, as shown in the figure, with Earth’s gravitational force as the only force external to the ball-string system. The speed of the ball at point P is 5.4ms. The acceleration of the ball at point P is most nearly
Two boxes of different masks are at rest. If both boxes are acted upon by equal force, which of the following statements is then true? -If both boxes are push the same distance, then both boxes will have the same final kinetic energy. -If both boxes are push the same distance, then the heavier box will have the smaller final momentum. -If both boxes are push the same distance, then the lighter box will have the greater final momentum. -If both boxes are push the same amount of time, than the heavier box will have the greater final kinetic energy. -If both boxes are pushed for the same amount of time, then both boxes will have the same final kinetic energy.
2. The acceleration of the cart shown below is represented in the given graph. If a second block is added to the cart, what might be the resulting acceleration? 0 m/s/s 0.27 m/s/s 0.4 m/s/s 0.53 m/s/s
PLEASE ANSWER ASAP! HIGH POINT QUESTION! What is the spring constant of a mass-spring oscillating system making 10 complete oscillations in 5 seconds when a mass of 2 kg is suspended from the spring? I'm really struggling with this one :/
n 1831, Michael Faraday was the first to realize that an electric current could be induced by passing a magnet through a coil of copper wire. Which factor is MOST essential for the induction of the electric current? a. The use of strong magnets for the process c. The use of magnetic material to make the coil b. The use of very long coils for the process d. The movement of the magnet relative to the coil of wire.
Suppose you have 4 bulbs in a parallel circuit. If you were to add 2 more bulbs in parallel with these 4, what would happen to the brightness of all the bulbs.
Suppose you have 4 bulbs in a parallel circuit. If you were to add 2 more bulbs in parallel with these 4, what would happen to the brightness of all the bulbs.
A student performs the stomp rocket lab on a windy day. A large gust of wind blows the rocket and it "hangs" in the air for a moment. Explain how this would affect the calculated value of velocity.
A student performs the stomp rocket lab on a windy day. A large gust of wind blows the rocket and it "hangs" in the air for a moment. Explain how this would affect the calculated value of velocity.
4. Indicate which of the following has the greatest momentum: a 500 kg car moving at 64 km/h, a 250 kg cart moving at 128 km/h, or a 1,000 kg truck moving at 32 km/h. Explain your answer
Abby is writing a biography of Issac Newton. He was a brilliant English scientist who developed the law of universal gravitation in the 1600's. Newton also developed laws of motion and ideas about inertia. his laws and ideas were used in many subjects such as physics,astronomy and mathematics. Explain inertia using Newtons first Law of Motion. Give an example of inertia.
A ball is launched with an initial horizontal velocity of 10.0 meters per second. It takes 500 milliseconds for the ball to reach its maximum height. a. Determine the maximum horizontal distance that the ball will travel. b. Calculate the initial vertical velocity of the ball. HELPP ASAPP!!!!!!
